Which of the following is NOT a way that machines provide a mechanical advantage?

a. change direction

b. change distance

c. change power

d. change force

Why is it very important that only one variable be changed in a n experiment

What type of sound occurs when an airway in the bronchial passage is obstructions limiting air flow?

A cylindrical resistor of length l is made from a metal of mass m. It has a resistance R. Two resistors, each of length 2l and mass m/2 , are then created from the same volume of the metal.

The fast server in women's tennis is Venus Williams, who recorded a serve of 130 mi/h (209 km/h) in 2007 If her racket pushed on the ball for a distance of 0.11 m, what was the average acceleration of the ball during her serve?

Apa yang dimaksudkan dengan elektromagnet

How are the relationships of elements in a group different from the relationships of elements in a period?

Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is the combined mass of the dog and basket?

What happens to the speed of the particles if the temperature is increased

A 65-year-old male enters the hospital with high blood pressure, damaged lungs, low blood-oxygen concentration, and throat cancer. What are all of these symptoms associated with?

At a certain factory, 340 kg crates are dropped vertically from a packing machine onto a conveyor belt moving at 1.00 m/s. (A motor maintains the belt's constant speed.) The coefficient of kinetic friction between belt and crate is 0.400.